The stewards at the Brazilian Grand Prix have decided to take no further action after investigating a collision between Romain Grosjean and Pedro de la Rosa during qualifying.

The incident happened during Q1 as Grosjean closed on de la Rosa along the pit straight. The Lotus driver lost his front wing against the rear of the HRT at high speed near the pit lane entry. Although the FIA believed neither was to blame, it said the collision could have resulted in a "very serious outcome".

"The driver of car 22 [de la Rosa] felt that he was following his normal line, was aware that car 10 [Grosjean] was behind him and was aware of the speed delta," the stewards report said. "The driver of car 10 believed he had been seen by the driver of car 22 and that car 22 was moving aside to the right to allow him through.

"Accordingly, the stewards consider this a driving incident due to the nature of the track but have advised the drivers, and the drivers agree, that this could have resulted in a very serious incident."

Grosjean had to pit for a new front wing and failed to make the cut for Q2 as a result. He said it was a disaster for his race chances.

"I left him doing his flying lap in front of me ... not a big deal and then I overtook him on the straight and going up the left on the inside of the straight he didn't see me and there was no space between the wall and his car.

"It's a disaster for tomorrow, we had a very good car and I don't know what to say. Let's see tomorrow, the weather may be strange."